Which of the following statements are correct?(A) In reverse bias of…

The correct answer is Option (2) → (A), (C) and (D) only

In a reverse-biased p-n junction the external battery adds to the junction's own potential difference, so the barrier grows and only a very small current flows.

(A) In reverse bias of a p-n junction, negative terminal of the battery is connected to p-side of the junction — Correct. The p-side is joined to the negative terminal and the n-side to the positive one.

(B) Reverse bias does not support the potential barrier at the junction. — Incorrect. Reverse bias is the case that supports the barrier: it widens the depletion layer and raises the barrier.

(C) In reverse bias, a few minority charge carriers cross the junction. — Correct. The barrier helps minority carriers across, which gives the small reverse (leakage) current.

(D) Resistance of p-n junction is high in reverse bias, reducing the current to a negligible value. — Correct. The wide depletion layer gives a very large resistance, so the current is of the order of microamperes.

Statements (A), (C) and (D) are correct, which is Option (2).

NCERT (2026-27):
p-n Junction Diode Under Reverse Bias – “When an external voltage (V) is applied across the diode such that n-side is positive and p-side is negative, it is said to be reverse biased [Fig.14.15(a)]. … The direction of applied voltage is same as the direction of barrier potential. As a result, the barrier height increases and the depletion region widens due to the change in the electric field. … The drift current is of the order of a few μA. This is quite low because it is due to the motion of carriers from their minority side to their majority side across the junction.”